l = [-2901939070.965906, 4539462982.372177, -6222008480.049856,
        -1400427921.5968666, 9866088144.060883, -2943107648.529664, 8985474333.11443,
        9204710651.257133, 5354113876.8447075, 8122228442.770859, -8121418938.303131,
        538431208.3261185, 9913821013.519611, -8722989752.449871, -3091279426.694975,
        7229910558.195713, -2908838839.99403, 2835257231.305996, 3922059795.3656673,
        -9298869735.322557]

print(l)

l = sorted(l)
print(l)
a1 = l[19]
a2 = 0
print(str(a1) + " -> " + str(a2))
l[19] = a2

b1 = l[18]
b2 = 0
print(str(b1) + " -> " + str(b2))
l[18] = b2

c1 = l[17]
c2 = 0
print(str(c1) + " -> " + str(c2))
l[17] = c2

print(sorted(l))
